Much of the hype about P2P has focused on file sharing, but ultimately, the key message of P2P is that the network, not any individual operating system, is becoming the next software development platform, as web sites and other internet nodes offer APIs and protocols for programmable services. What will that platform look like? Who will own its infrastructure? Microsoft's .Net has made a bold claim to be that next operating framework, but it is far from the only contender. In this debate, we'll try to understand the dimensions of the emerging web services paradigm.